1998 NISSAN PICK-UP clutch

FOR DKS-17CH COMPRESSOR
Tool number
Tool nameDescription
KV99231260
Clutch disc wrench
NT204
Removing shaft nut and clutch disc
KV992T0001
Clutch disc puller
NT206
Removing clutch disc
KV992T0002
Pulley installer
NT207
Installing pulley
PRECAUTIONS AND PREPARATION
Special Service Tools (Cont'd)
HA-7

Refrigeration Cycle
REFRIGERANT FLOW
The refrigerant flow is in the standard pattern. Refrigerant flows through the compressor, condenser, liquid
tank, evaporator and back to the compressor.
The refrigerant evaporation through the evaporator coil is controlled by an externally equalized expansion
valve, located inside the evaporator case.
FREEZE PROTECTION
The compressor cycles on and off to maintain the evaporator temperature within a specified range. When
the evaporator coil temperature falls below a specified point, the thermo control amplifier interrupts the
compressor operation. When the evaporator coil temperature rises above the specification, the thermo con-
trol amplifier allows compressor operation.
REFRIGERANT SYSTEM PROTECTION
Triple-pressure switch
The triple-pressure switch is located on the liquid tank. If the system pressure rises or falls out of
specifications, the switch opens to interrupt compressor clutch operation.
Fusible plug
Open at temperature above 105ÉC (221ÉF), thereby discharging refrigerant to the atmosphere. If this plug
is melted and opened, check the refrigerant line and replace liquid tank.
SHA504DB
DESCRIPTION
HA-12

Symptom Chart
DIAGNOSTIC TABLE
PROCEDUREPreliminary
CheckDiagnostic
ProcedureMain
Power
Supply
and
Ground
Circuit
CheckElectrical Components Inspection
REFERENCE PAGE
HA-21
HA-22
HA-23
HA-37
HA-39
HA-36
HA-43
HA-43
HA-43
HA-43
HA-44
HA-44
HA-44
HA-60
HA-45
Ð
SYMPTOM
Preliminary check 1
Preliminary check 2
Preliminary check 3
Diagnostic procedure 1
Diagnostic procedure 2
15A Fuses (No.
19
and
20 )
7.5A Fuse (No.
21 )
Blower motor
Blower resistor
A/C switch
Fan switch
Thermo control amp.
A/C relay
Triple-pressure switch
Compressor
Harness Magnet clutch
Thermal protector
A/C does not blow cold air.j jjjjjjjjjjjj
Blower motor does not rotate.
jjjjj j
Magnet clutch does not
engage when A/C switch and
fan switch are ON.
j jjjjjjjj
Noise.
Insufficient heating.jj
,: The number means checking order.
j: Checking order depends on malfunction in flow chart.
TROUBLE DIAGNOSES
HA-20

PRELIMINARY CHECK 2
Noise
CHECK WHERE NOISE COMES FROM.
Blower motorCompressorExpansion valveRefrigerant lineBelt
CHECK FOR
NOISE IN ALL
MODES AND
TEMPERATURE
SETTINGS.
Noise is
constant
.
Inspect the com-
pressor clutch and
pulley and idler
pulley.
OK NGReplace expan-
sion valve.
CHECK
BLOWER
MOTOR AND
FAN FOR
WEAR.
OK
.
NGReplace com-
pressor clutch
and pulley.
Refer to
HA-60 or 64.
Line is fixed
directly to body.Line is not fixed.
Replace
blower
motor or
fan.CHECK DISC-TO-
PULLEY CLEAR-
ANCE.
Refer to HA-62 or
66.
OKFix line with
rubber or vibra-
tion absorbing
material.
Fix line tightly.
CHECK
BLOWER
MOTOR FOR
FOREIGN PAR-
TICLES.
NGCHECK AND
ADJUST COM-
PRESSOR
LUBRICANT.
Refer to HA-50.OK
Remove foreign
particles from
intake unit.
Replace compres-
sor and liquid
tank.Belt vibration is
intense.Side of belt is
worn out.
Noise is
intermittent
CHECK AIR DIS-
CHARGE DUCTS
FOR OBSTRUC-
TIONS, FOREIGN
MATERIALS OR
AIR LEAKAGE.
.
NGReadjust belt
tension.
Refer to MA
section
(``Checking
Drive Belts'',
``ENGINE
MAINTE-
NANCE'').
Pulley center
does not match.
Readjust pulley
center.
Refer to HA-61 or
65.
Remove obstruc-
tions or repair air
leakage.
.....
...
....
...
..
....
..
TROUBLE DIAGNOSES
Preliminary Check (Cont'd)
HA-22

VA
Malfunctioning blower motor fan.Malfunctioning electrical circuit.Malfunctioning blower motor internal
circuit.
Loose fan/Improper contact of fan
and case/Deformed fan.Discontinued wiring or component
circuits or poor connection/
Malfunctioning resistor, amplifier,
etc./Burned out fuse or low battery
voltage.
VB
Magnet clutch does not engage.Magnet clutch slipping.Belt slipping.
CHECK MAGNET CLUTCH.
Inspect coil circuit, disc-to-pulley
clearance.CHECK COMPRESSOR BELT AND
BELT TENSION. Refer to MA sec-
tion (``Checking Drive Belts'',
``ENGINE MAINTENANCE'').
CHECK ELECTRICAL CIRCUIT.
Inspect wiring, components circuit.cMalfunctioning internal parts of
clutch, compressor.
CHECK ACTIVATION OF SAFETY/
PROTECTION DEVICES. Inspect
devices such as pressure switch,
etc.cForeign particles on clutch frictional
surface or excessive disc clear-
ance.
cMalfunctioning electrical circuit
(poor connection, low battery
voltage, etc.).
...
..
...
..
.
.
TROUBLE DIAGNOSES
Performance Test Diagnoses (Cont'd)
HA-25

Diagnostic Procedure 2
EXCEPT FOR KA ENGINE MODELS
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
lPerform PRELIMINARY CHECK 1 before referring to the
following flow chart.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connec-
tor.
Do approx. 12 volts exist between com-
pressor harness terminal No.
V1and body
ground?
No
cYes
Check the following.
lMagnet clutch coillThermal protector (Except
for the Middle East)
NG
Replace magnet clutch.
Refer to HA-60.
Note
Check circuit continuity between A/C relay
harness terminal No.
V5and compressor
harness terminal No.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V3and body
ground?
Yes
cNo
Check power supply circuit
and 7.5A fuse (No.
21 ,
located in the fuse block).
(Refer to ``POWER SUP-
PLY ROUTING'' in EL sec-
tion and Wiring Diagram.)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V1and body
ground?
No
cYes
Check power supply circuit
and 7.5A fuse (No.
21 ,
located in the fuse block).
(Refer to ``POWER SUP-
PLY ROUTING'' in EL sec-
tion and Wiring Diagram.)
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-44.
OK
cNG
Replace A/C relay.
Reconnect A/C relay.
Note
Check circuit continuity between A/C relay
harness terminal No.
V2and triple-pres-
sure switch harness terminal No.
V4.
Continuity should exist.
If OK, check harness for short.
OK
VA(Go to next page.)
Note:
If the result is NG after checking circuit continuity, repair harness or con-
nector.
RHA325G
RHA748FD
RHA359G
RHA375G
RHA327GA
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSES
HA-39

FOR KA ENGINE MODELS
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
lPerform PRELIMINARY CHECK 1 before referring to the
following flow chart.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connec-
tor.
Do approx. 12 volts exist between com-
pressor harness terminal No.
V1and body
ground?
No
cYes
Check the following.
lMagnet clutch coil
lThermal protector
NG
Replace magnet clutch.
Refer to HA-60.
Note
Check circuit continuity between A/C relay
harness terminal No.
V5and compressor
harness terminal No.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V3and body
ground?
Yes
cNo
Check power supply circuit
and 7.5A fuse (No.
21 ,
located in the fuse block).
(Refer to ``POWER SUP-
PLY ROUTING'' in EL sec-
tion and Wiring Diagram.)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V1and body
ground?
Yes
cNo
Check power supply circuit
and 7.5A fuse (No.
21 ,
located in the fuse block).
(Refer to ``POWER SUP-
PLY ROUTING'' in EL sec-
tion and Wiring Diagram.)
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-44.
OK
cNG
Replace A/C relay.
Reconnect A/C relay.
VA
(Go to next page.)
Note:
If the result is NG after checking circuit continuity, repair harness or con-
nector.
RHA333G
RHA334G
RHA359G
RHA375G
.
.
.
.
.
.
.
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-41

Compressor Ð DKV-14C (ZEXEL make)
Compressor Clutch Ð DKV-14C
(ZEXEL make)
REMOVAL
lWhen removing center bolt, hold clutch disc with clutch disc
wrench.
lRemove the clutch disc using Tool KV99232340.
Insert holder's three pins into the clutch disc. Rotate the
holder clockwise to hook it onto the plate. Then, tighten the
center bolt to remove the clutch disc.
When tightening the center bolt, insert a round bar
(screwdriver, etc.) between two of the pins (as shown in the
left-hand figure) to prevent clutch disc rotation. After remov-
ing the clutch disc, remove the shims from either the drive
shaft or the clutch disc.
lRemove the snap ring using external snap ring pliers.
SHA878E
RHA366G
RHA367G
AHA843
SERVICE PROCEDURES
HA-60